Headphone



FIG. 1 is a perspective view of a headphone;

FIG. 2 is a front elevational view of the headphone;

FIG. 3 is a rear elevational view of the headphone;

FIG. 4 is a bottom plan view of the headphone;

FIG. 5 is a right side elevational view of the headphone; and,

FIG. 6 is an enlarged partial view of the headphone taken from FIG. 5.

The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are directed to environment that forms no part of the claimed design. 

CLAIM We claim the ornamental design for a headphone, as shown and described. 